A couple of questions regarding the DB attacks I came across when my girlfriend reviewed OpenMW for me the other day:
1) Are Dark Brotherhood attacks technically supposed to happen every time you sleep after a new game or is it supposed to be random? So far she's gotten attacked (and killed) every single time she goes to sleep. I don't remember how it works in Vanilla but it seems even more aggressive than I remember it being (I remember it always being a little on the broken side since the devs assumed you'd kill the assassins off and be at a higher level when you started Tribunal).

2) Are guards supposed to attack Dark Brotherhood assassins (and first-striking NPCs in general)? She was running away from a Dark Brotherhood assassin she ran into outside of Seyda Neen and ran back to the town for protection from the guards only to have them stand there as she ran around them in circles with the assassin slashing at her until she was cut down. I don't remember how Vanilla works here either, but it was really a bummer.

3) Side note: It seems the following script for NPCs is pretty good, as the DB assassin followed her for a good ten minutes through the terrain and through many game exterior cells. However, I might note that the following behavior is a little unrealistic since you can get super far away from an enemy and they'll still follow you and keep you from sleeping for health.

A couple of questions regarding the DB attacks I came across when my girlfriend reviewed OpenMW for me the other day:
1) Are Dark Brotherhood attacks technically supposed to happen every time you sleep after a new game or is it supposed to be random?

It's random. By the nature of randomness, it's possible to happen several times consecutively (IIRC, it rolls once every hour of sleep).

Not usually. Morrowind had problems with guards not attacking aggressive NPCs because it lacked the ability to tell if NPCs were acting lawfully (this was added in Oblivion), so guards tend to only help against creature attacks.

A couple of questions regarding the DB attacks I came across when my girlfriend reviewed OpenMW for me the other day:
1) Are Dark Brotherhood attacks technically supposed to happen every time you sleep after a new game or is it supposed to be random?

It's random. By the nature of randomness, it's possible to happen several times consecutively (IIRC, it rolls once every hour of sleep).

@Greendogo: Since your girlfriend's character must have been at level 1, the game checks random(100) <= random(20) for the first encounter, random(100) <= random(10) for the second one, and random(100) <= random(0) from then on. Getting attacked every time seems a bit strange. I've just tested it with a lvl-1 character and everything looks fine.

Greendogo wrote:So far she's gotten attacked (and killed) every single time she goes to sleep.

The only safe place is the bed roll in the cellar of the census office (the building where you can loot some stuff on character generation)
Have a weapon readied when going to sleep, that saves some time when you do get attacked

like the normal DB attack delay mod does. (That spoiler is so incredibly minor I considered not spoilering it.) Once you kill them go report the attacks and they'll stop happening. Just reporting them doesn't start the Tribunal quest line, just stops the attacks.